Inertial flow structures in a simple‐packed bed of spheres

Suekane, Tetsuya; Yokouchi, Yasuo; Hirai, Shuichiro

doi:10.1002/aic.690490103

Cited by 112 publications

(82 citation statements)

References 24 publications

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“…Tomographic and optical techniques can provide additional experimental information about flow field dynamic in porous beds. Tomographic techniques include Magnetic Resonance Imaging (MRI) (Baldwin et al 1996;Sederman et al 1998;Ogawa et al 2001;Suekane et al 2003), Emission Tomography (PET) (Khalili et al 1998), NMR imaging (Baldwin et al 1996;Johns and Gladden 1999), gamma attenuation (Imhoff et al 1994) and X-ray tomography (Imhoff et al 1996). The drawbacks of these techniques are rather expensive test facilities and generally poor spatial and temporal resolution, (Chang and Watson 1999;Gladden et al 2006).…”

Section: Introductionsupporting

confidence: 42%

Measurements of Transitional and Turbulent Flow in a Randomly Packed Bed of Spheres with Particle Image Velocimetry

et al. 2016

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Particle image velocimetry (PIV) has been used to investigate transitional and turbulent flow in a randomly packed bed of mono-sized transparent spheres at particle Reynolds number, 20 < Re p < 3220. The refractive index of the liquid is matched with the spheres to provide optical access to the flow within the bed without distortions. Integrated pressure drop data yield that Darcy law is valid at Re p ≈ 80. The PIV measurements show that the velocity fluctuations increase and that the time-averaged velocity distribution start to change at lower Re p . The probability for relatively low and high velocities decreases with Re p and recirculation zones that appear in inertia dominated flows are suppressed by the turbulent flow at higher Re p . Hence there is a maximum of recirculation at about Re p ≈ 400. Finally, statistical analysis of the spatial distribution of time-averaged velocities shows that the velocity distribution is clearly and weakly self-similar with respect to Re p for turbulent and laminar flow, respectively.

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Section: Introductionsupporting

confidence: 42%

Measurements of Transitional and Turbulent Flow in a Randomly Packed Bed of Spheres with Particle Image Velocimetry

et al. 2016

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“…Tomographic techniques include magnetic resonance imaging (MRI) (Baldwin et al 1996;Sederman et al 1998;Ogawa et al 2001;Suekane et al 2003), positron emission tomography (PET) (Khalili et al 1998), nuclear magnetic resonance (NMR) imaging (Baldwin et al 1996), gamma attenuation (Imhoff et al 1994) and X-ray tomography (Imhoff et al 1996). These methods involve rather expensive equipment and may give poor spatial and temporal resolution (Kutsovsky et al 1996;Chang and Watson 1999;Gladden et al 2006).…”

Section: Introductionsupporting

confidence: 40%

Transitional and Turbulent Flow in a Bed of Spheres as Measured with Stereoscopic Particle Image Velocimetry

et al. 2017

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Stereoscopic particle image velocimetry has been used to investigate inertia dominated, transitional and turbulent flow in a randomly packed bed of monosized PMMA spheres. By using an index-matched fluid, the bed is optically transparent and measurements can be performed in an arbitrary position within the porous bed. The velocity field observations are carried out for particle Reynolds numbers, Re p , between 20 and 3220, and the sampling is done at a frequency of 75 Hz. Results show that, in porous media, the dynamics of the flow can vary significantly from pore to pore. At Re p around 400 the spatially averaged time fluctuations of total velocity reach a maximum and the spatial variation of the time-averaged total velocity, u tot increases up to about the same Re p and then it decreases. Also in the studied planes, a considerable amount of the fluid moves in the perpendicular directions to the main flow direction and the time-averaged magnitude of the velocity in the main direction, u x , has an averaged minimum of 40% of the magnitude of u tot at Re p about 400. For Re p > 1600, this ratio is nearly constant and u x is on average a little bit less than 50% of u tot . The importance of the results for longitudinal and transverse dispersion is discussed.

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“…For example, Merrill and Jin [11] and Mansfield and Issa [12] measured the local velocity of water injected into Casper and Bentheimer sandstones, respectively. Authors used our MRI equipment to measure the local velocity distributions in porous media [9][10]13]. The details of the MRI techniques have been published elsewhere [14,15].…”

Section: Mri Measurement Techniquessupporting

confidence: 42%

Migration of CO2 in Porous Media Filled with water.

Suekane

Ishii

Tsushima

et al. 2006

JTST

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This paper describes experimental research on two-phase flow of supercritical carbon dioxide (CO 2 ) and water in porous media under sequestration conditions. We used a magnetic resonance imaging technique to directly visualize the distribution of supercritical CO 2 injected into porous media containing water. In-situ water saturation distributions in a Berea sandstone core and a packed bed of glass beads were successfully visualized at conditions that simulate those at 700 -1000-m depths in an aquifer. By applying a coreflood interpretation method to our saturation data, we could describe the local Darcy phase velocities and capillary dispersion rate as a function of saturation. Next, the effect of buoyancy on the displacement process and gravity-dominated pure counter-current flow is discussed by comparing the data obtained at two conditions that model the aquifers at depths of 700 m and 1000 m. We found that buoyancy largely controls the pure counter-current flow in permeable porous media for conditions at 700 and 1000-m depths.

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Inertial flow structures in a simple‐packed bed of spheres

Cited by 112 publications

References 24 publications

Measurements of Transitional and Turbulent Flow in a Randomly Packed Bed of Spheres with Particle Image Velocimetry

Measurements of Transitional and Turbulent Flow in a Randomly Packed Bed of Spheres with Particle Image Velocimetry

Transitional and Turbulent Flow in a Bed of Spheres as Measured with Stereoscopic Particle Image Velocimetry

Migration of CO2 in Porous Media Filled with water.

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